Annual report pursuant to Section 13 and 15(d)

Outstanding Loans and Leases - Loans Held-for-Sale (Details)

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Outstanding Loans and Leases - Loans Held-for-Sale (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans held-for-sale $ 19,413,000,000 $ 13,762,000,000  
Proceeds from sales securitizations and paydowns of loans held for sale 55,900,000,000 147,500,000,000 281,700,000,000
Proceeds used for originations and purchase of loan held for sale $ 59,800,000,000 $ 118,200,000,000 $ 263,000,000,000